Email 'Message-IDs' helpful for forensic analysis?

Keyboard ShortCut to Hide/Unhide Rows & Columns in Excel

Excel: Keyboard shortcut to hide rows or columns

Ctrl + 9 : Hide the selected rows

Ctrl + 0 : Hide the selected columns

Excel: Keyboard shortcut to Unhide hidden rows or columns

Ctrl + Shift + 9 : Unhide any hidden rows within the selection

Ctrl + Shift + 0 : Unhide any hidden columns within the selection